<Canvas Width="300" Height="300"
   xmlns="http://schemas.microsoft.com/client/2007"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   
  <!--emphasize MediaElement-->
  <MediaElement Source="xbox.wmv" Width="300" Height="300" />
  
  <!--emphasize Ellipse-->
  <Ellipse Height="200" Width="200" Canvas.Left="30" Canvas.Top="30"
     Stroke="Black" StrokeThickness="10" Fill="SlateBlue"
     Opacity="0.6" />
</Canvas>
